package main

import (
	"fmt"
)

const (
	TextBlack = iota + 30
	TextRed
	TextGreen
	TextYellow
	TextBlue
	TextMagenta
	TextCyan
	TextWhite
)
const (
	TextA = iota
	TextB
)

func Add2(x, y int) int {
	return x + y
}

func sub(x, y int) int {
	return x - y
}

func main() {
	fmt.Println(len("你好"))

	b := true

	if !b {
		fmt.Println("b==false")
	}
}